[Ffmpeg-devel] [BUG] garbled sound when playing 8kHz MP3s

[Michael Niedermayer]

Hi

On Wed, Nov 15, 2006 at 10:10:15PM +0100, Stefan Gehrer wrote:
> Hi list,
> 
> I found that 8kHz mp3 files sound a bit garbled when decoded with ffmpeg.
> I also get error messages like
> 
> foo at bar:~$ ./ffplay ../s8000.mp3
> invalid new backstep 95
> overread, skip -7 enddists: -1 -1
> overread, skip -7 enddists: -5 -5
> overread, skip -7 enddists: -1 -1
> overread, skip -6 enddists: -4 -4
> invalid new backstep 130
> overread, skip -6 enddists: -1 -1
> overread, skip -7 enddists: -6 -6
> overread, skip -9 enddists: -7 -7
> 
> The same happens when playing back in mplayer or mpg123, but the error 
> message are different:
> 
> mpg123: Can't rewind stream by 5 bits!1%
> mpg123: Can't rewind stream by 144 bits!
> mpg123: Can't rewind stream by 3 bits!1%
> mpg123: Can't rewind stream by 22 bits!%
> mpg123: Can't rewind stream by 46 bits!%
> 
> But if I decode the file with lame, it sounds OK.
> To reproduce, it should be sufficient to encode your favorite piece of music
> with 'lame --resample 8' (note that this is not a general recommendation to
> encode good music at 8kHz :) ).
> But if anybody is interested I can upload a sample where this happens.

is there any decoder besides lame which can decode it? if no then i would
guess that the bug is in lame though thats just a guess (1 buggy program vs.
2 buggy programs)

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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